From a86ad1be903d34aa675ad88d3542f5739b725147 Mon Sep 17 00:00:00 2001
From: Eldad Fux <eldad.fux@gmail.com>
Date: Sat, 20 Jun 2020 14:05:43 +0300
Subject: [PATCH] Improve PHP exeution time by using fully-qualified function
 calls

---
 CONTRIBUTING.md                               |  10 ++
 src/Appwrite/Auth/Auth.php                    |  20 ++--
 src/Appwrite/Auth/OAuth2.php                  |  24 ++--
 src/Appwrite/Auth/OAuth2/Amazon.php           |  16 +--
 src/Appwrite/Auth/OAuth2/Apple.php            |  32 +++---
 src/Appwrite/Auth/OAuth2/Bitbucket.php        |  18 +--
 src/Appwrite/Auth/OAuth2/Bitly.php            |  14 +--
 src/Appwrite/Auth/OAuth2/Discord.php          |  16 +--
 src/Appwrite/Auth/OAuth2/Dropbox.php          |  12 +-
 src/Appwrite/Auth/OAuth2/Facebook.php         |  14 +--
 src/Appwrite/Auth/OAuth2/GitHub.php           |  14 +--
 src/Appwrite/Auth/OAuth2/Gitlab.php           |  14 +--
 src/Appwrite/Auth/OAuth2/Google.php           |  14 +--
 src/Appwrite/Auth/OAuth2/LinkedIn.php         |  14 +--
 src/Appwrite/Auth/OAuth2/Microsoft.php        |  16 +--
 src/Appwrite/Auth/OAuth2/Mock.php             |  14 +--
 src/Appwrite/Auth/OAuth2/Paypal.php           |  18 +--
 src/Appwrite/Auth/OAuth2/Salesforce.php       |  18 +--
 src/Appwrite/Auth/OAuth2/Slack.php            |  14 +--
 src/Appwrite/Auth/OAuth2/Spotify.php          |  16 +--
 src/Appwrite/Auth/OAuth2/Twitch.php           |  14 +--
 src/Appwrite/Auth/OAuth2/Vk.php               |  14 +--
 src/Appwrite/Auth/OAuth2/Yahoo.php            |  18 +--
 src/Appwrite/Auth/OAuth2/Yandex.php           |  18 +--
 src/Appwrite/Auth/Validator/Password.php      |   2 +-
 src/Appwrite/Database/Adapter/MySQL.php       | 106 +++++++++---------
 src/Appwrite/Database/Adapter/Redis.php       |   8 +-
 src/Appwrite/Database/Database.php            |  10 +-
 src/Appwrite/Database/Document.php            |  24 ++--
 .../Database/Validator/Authorization.php      |   6 +-
 .../Database/Validator/Collection.php         |   6 +-
 src/Appwrite/Database/Validator/Key.php       |   6 +-
 .../Database/Validator/Permissions.php        |   6 +-
 src/Appwrite/Database/Validator/Structure.php |  18 +--
 src/Appwrite/Database/Validator/UID.php       |   2 +-
 src/Appwrite/Network/Validator/CNAME.php      |   4 +-
 src/Appwrite/Network/Validator/Origin.php     |   8 +-
 src/Appwrite/OpenSSL/OpenSSL.php              |   8 +-
 src/Appwrite/Resize/Resize.php                |  20 ++--
 .../Storage/Compression/Algorithms/GZIP.php   |   4 +-
 src/Appwrite/Storage/Device/Local.php         |  58 +++++-----
 src/Appwrite/Storage/Device/S3.php            |   2 +-
 src/Appwrite/Storage/Storage.php              |   8 +-
 src/Appwrite/Storage/Validator/FileName.php   |   2 +-
 src/Appwrite/Storage/Validator/FileType.php   |  10 +-
 src/Appwrite/Template/Template.php            |  14 +--
 src/Appwrite/URL/URL.php                      |   8 +-
 47 files changed, 371 insertions(+), 361 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 83321193d..51e405093 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -161,6 +161,16 @@ To run tests manually, run phpunit from your command line:
 docker exec appwrite test
 ```
 
+## Code Maintenance  
+
+We use some automation tools to help us keep a healthy code base.
+
+Improve PHP exeution time by using [fully-qualified function calls](https://veewee.github.io/blog/optimizing-php-performance-by-fq-function-calls/):
+
+```bash
+php-cs-fixer fix src/ --rules=native_function_invocation --allow-risky=yes  
+```
+
 ## Tutorials
 
 From time to time, our team will add tutorials that will help contributors find their way in the Appwrite source code. Below is a list of currently available tutorials:
diff --git a/src/Appwrite/Auth/Auth.php b/src/Appwrite/Auth/Auth.php
index ef787b869..634b456c7 100644
--- a/src/Appwrite/Auth/Auth.php
+++ b/src/Appwrite/Auth/Auth.php
@@ -82,7 +82,7 @@ class Auth
      */
     public static function encodeSession($id, $secret)
     {
-        return base64_encode(json_encode([
+        return \base64_encode(\json_encode([
             'id' => $id,
             'secret' => $secret,
         ]));
@@ -99,14 +99,14 @@ class Auth
      */
     public static function decodeSession($session)
     {
-        $session = json_decode(base64_decode($session), true);
+        $session = \json_decode(\base64_decode($session), true);
         $default = ['id' => null, 'secret' => ''];
 
-        if (!is_array($session)) {
+        if (!\is_array($session)) {
             return $default;
         }
 
-        return array_merge($default, $session);
+        return \array_merge($default, $session);
     }
 
     /**
@@ -120,7 +120,7 @@ class Auth
      */
     public static function hash($string)
     {
-        return hash('sha256', $string);
+        return \hash('sha256', $string);
     }
 
     /**
@@ -134,7 +134,7 @@ class Auth
      */
     public static function passwordHash($string)
     {
-        return password_hash($string, PASSWORD_BCRYPT, array('cost' => 8));
+        return \password_hash($string, PASSWORD_BCRYPT, array('cost' => 8));
     }
 
     /**
@@ -147,7 +147,7 @@ class Auth
      */
     public static function passwordVerify($plain, $hash)
     {
-        return password_verify($plain, $hash);
+        return \password_verify($plain, $hash);
     }
 
     /**
@@ -163,7 +163,7 @@ class Auth
      */
     public static function passwordGenerator(int $length = 20):string
     {
-        return bin2hex(random_bytes($length));
+        return \bin2hex(\random_bytes($length));
     }
 
     /**
@@ -179,7 +179,7 @@ class Auth
      */
     public static function tokenGenerator(int $length = 128):string
     {
-        return bin2hex(random_bytes($length));
+        return \bin2hex(\random_bytes($length));
     }
 
     /**
@@ -199,7 +199,7 @@ class Auth
                isset($token['expire']) &&
                $token['type'] == $type &&
                $token['secret'] === self::hash($secret) &&
-               $token['expire']  >= time()) {
+               $token['expire']  >= \time()) {
                 return $token->getId();
             }
         }
diff --git a/src/Appwrite/Auth/OAuth2.php b/src/Appwrite/Auth/OAuth2.php
index 1f30d30db..8547edc75 100644
--- a/src/Appwrite/Auth/OAuth2.php
+++ b/src/Appwrite/Auth/OAuth2.php
@@ -95,7 +95,7 @@ abstract class OAuth2
     protected function addScope(string $scope):OAuth2
     {
         // Add a scope to the scopes array if it isn't already present 
-        if (!in_array($scope, $this->scopes)){
+        if (!\in_array($scope, $this->scopes)){
             $this->scopes[] = $scope; 
         }
         return $this;
@@ -120,7 +120,7 @@ abstract class OAuth2
      */
     public function parseState(string $state)
     {
-        return json_decode($state, true);
+        return \json_decode($state, true);
     }
 
     /**
@@ -133,24 +133,24 @@ abstract class OAuth2
      */
     protected function request(string $method, string $url = '', array $headers = [], string $payload = ''):string
     {
-        $ch = curl_init($url);
+        $ch = \curl_init($url);
 
-        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
-        curl_setopt($ch, CURLOPT_HEADER, 0);
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-        curl_setopt($ch, CURLOPT_USERAGENT, '');
+        \curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
+        \curl_setopt($ch, CURLOPT_HEADER, 0);
+        \curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+        \curl_setopt($ch, CURLOPT_USERAGENT, '');
 
         if (!empty($payload)) {
-            curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
+            \curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
         }
 
-        $headers[] = 'Content-length: '.strlen($payload);
-        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+        $headers[] = 'Content-length: '.\strlen($payload);
+        \curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
 
         // Send the request & save response to $response
-        $response = curl_exec($ch);
+        $response = \curl_exec($ch);
 
-        curl_close($ch);
+        \curl_close($ch);
 
         return $response;
     }
diff --git a/src/Appwrite/Auth/OAuth2/Amazon.php b/src/Appwrite/Auth/OAuth2/Amazon.php
index b025c3258..eb7433c1c 100644
--- a/src/Appwrite/Auth/OAuth2/Amazon.php
+++ b/src/Appwrite/Auth/OAuth2/Amazon.php
@@ -38,7 +38,7 @@ class Amazon extends OAuth2
      */
     public function parseState(string $state)
     {
-        return json_decode(html_entity_decode($state), true);
+        return \json_decode(\html_entity_decode($state), true);
     }
 
 
@@ -47,11 +47,11 @@ class Amazon extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://www.amazon.com/ap/oa?'.http_build_query([
+        return 'https://www.amazon.com/ap/oa?'.\http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
-                'state' => json_encode($this->state),
+                'scope' => \implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state),
                 'redirect_uri' => $this->callback
             ]);
     }
@@ -68,7 +68,7 @@ class Amazon extends OAuth2
             'POST',
             'https://api.amazon.com/auth/o2/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID ,
                 'client_secret' => $this->appSecret,
@@ -76,7 +76,7 @@ class Amazon extends OAuth2
                 'grant_type' => 'authorization_code'
             ])
         );
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -141,8 +141,8 @@ class Amazon extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://api.amazon.com/user/profile?access_token='.urlencode($accessToken));
-            $this->user = json_decode($user, true);
+            $user = $this->request('GET', 'https://api.amazon.com/user/profile?access_token='.\urlencode($accessToken));
+            $this->user = \json_decode($user, true);
         }
         return $this->user;
     }
diff --git a/src/Appwrite/Auth/OAuth2/Apple.php b/src/Appwrite/Auth/OAuth2/Apple.php
index 411f8baf5..9fdf2ab22 100644
--- a/src/Appwrite/Auth/OAuth2/Apple.php
+++ b/src/Appwrite/Auth/OAuth2/Apple.php
@@ -41,13 +41,13 @@ class Apple extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://appleid.apple.com/auth/authorize?'.http_build_query([
+        return 'https://appleid.apple.com/auth/authorize?'.\http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'state' => json_encode($this->state),
+            'state' => \json_encode($this->state),
             'response_type' => 'code',
             'response_mode' => 'form_post',
-            'scope' => implode(' ', $this->getScopes())
+            'scope' => \implode(' ', $this->getScopes())
         ]);
     }
 
@@ -63,7 +63,7 @@ class Apple extends OAuth2
             'POST',
             'https://appleid.apple.com/auth/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'grant_type' => 'authorization_code',
                 'code' => $code,
                 'client_id' => $this->appID,
@@ -72,10 +72,10 @@ class Apple extends OAuth2
             ])
         );
 
-        $accessToken    = json_decode($accessToken, true);
+        $accessToken    = \json_decode($accessToken, true);
 
-        $this->claims   = (isset($accessToken['id_token'])) ? explode('.', $accessToken['id_token']) : [0 => '', 1 => ''];
-        $this->claims   = (isset($this->claims[1])) ? json_decode(base64_decode($this->claims[1]), true) : [];
+        $this->claims   = (isset($accessToken['id_token'])) ? \explode('.', $accessToken['id_token']) : [0 => '', 1 => ''];
+        $this->claims   = (isset($this->claims[1])) ? \json_decode(\base64_decode($this->claims[1]), true) : [];
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -135,7 +135,7 @@ class Apple extends OAuth2
     protected function getAppSecret():string
     {
         try {
-            $secret = json_decode($this->appSecret, true);
+            $secret = \json_decode($this->appSecret, true);
         } catch (\Throwable $th) {
             throw new Exception('Invalid secret');
         }
@@ -152,19 +152,19 @@ class Apple extends OAuth2
         
         $claims = [
             'iss' => $teamID,
-            'iat' => time(),
-            'exp' => time() + 86400*180,
+            'iat' => \time(),
+            'exp' => \time() + 86400*180,
             'aud' => 'https://appleid.apple.com',
             'sub' => $bundleID,
         ];
 
-        $pkey = openssl_pkey_get_private($keyfile);
+        $pkey = \openssl_pkey_get_private($keyfile);
 
-        $payload = $this->encode(json_encode($headers)).'.'.$this->encode(json_encode($claims));
+        $payload = $this->encode(\json_encode($headers)).'.'.$this->encode(\json_encode($claims));
 
         $signature = '';
 
-        $success = openssl_sign($payload, $signature, $pkey, OPENSSL_ALGO_SHA256);
+        $success = \openssl_sign($payload, $signature, $pkey, OPENSSL_ALGO_SHA256);
 
         if (!$success) return '';
 
@@ -176,7 +176,7 @@ class Apple extends OAuth2
      */
     protected function encode($data)
     {
-        return str_replace(['+', '/', '='], ['-', '_', ''], base64_encode($data));
+        return \str_replace(['+', '/', '='], ['-', '_', ''], \base64_encode($data));
     }
 
     /**
@@ -184,8 +184,8 @@ class Apple extends OAuth2
      */
     protected function retrievePositiveInteger(string $data): string
     {
-        while ('00' === mb_substr($data, 0, 2, '8bit') && mb_substr($data, 2, 2, '8bit') > '7f') {
-            $data = mb_substr($data, 2, null, '8bit');
+        while ('00' === \mb_substr($data, 0, 2, '8bit') && \mb_substr($data, 2, 2, '8bit') > '7f') {
+            $data = \mb_substr($data, 2, null, '8bit');
         }
 
         return $data;
diff --git a/src/Appwrite/Auth/OAuth2/Bitbucket.php b/src/Appwrite/Auth/OAuth2/Bitbucket.php
index 6b00cea62..ff867cbe6 100644
--- a/src/Appwrite/Auth/OAuth2/Bitbucket.php
+++ b/src/Appwrite/Auth/OAuth2/Bitbucket.php
@@ -32,11 +32,11 @@ class Bitbucket extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://bitbucket.org/site/oauth2/authorize?'.http_build_query([
+        return 'https://bitbucket.org/site/oauth2/authorize?'.\http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
-                'state' => json_encode($this->state),
+                'scope' => \implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state),
             ]);
     }
 
@@ -54,7 +54,7 @@ class Bitbucket extends OAuth2
             'POST',
             'https://bitbucket.org/site/oauth2/access_token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
@@ -62,7 +62,7 @@ class Bitbucket extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -127,11 +127,11 @@ class Bitbucket extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://api.bitbucket.org/2.0/user?access_token='.urlencode($accessToken));
-            $this->user = json_decode($user, true);
+            $user = $this->request('GET', 'https://api.bitbucket.org/2.0/user?access_token='.\urlencode($accessToken));
+            $this->user = \json_decode($user, true);
 
-            $email = $this->request('GET', 'https://api.bitbucket.org/2.0/user/emails?access_token='.urlencode($accessToken));
-            $this->user['email'] = json_decode($email, true)['values'][0]['email'];
+            $email = $this->request('GET', 'https://api.bitbucket.org/2.0/user/emails?access_token='.\urlencode($accessToken));
+            $this->user['email'] = \json_decode($email, true)['values'][0]['email'];
         }
         return $this->user;
     }
diff --git a/src/Appwrite/Auth/OAuth2/Bitly.php b/src/Appwrite/Auth/OAuth2/Bitly.php
index d6f5b5262..3da36d503 100644
--- a/src/Appwrite/Auth/OAuth2/Bitly.php
+++ b/src/Appwrite/Auth/OAuth2/Bitly.php
@@ -44,10 +44,10 @@ class Bitly extends OAuth2
     public function getLoginURL():string
     {
         return $this->endpoint . 'authorize?'.
-            http_build_query([
+            \http_build_query([
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
-                'state' => json_encode($this->state)
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -62,19 +62,19 @@ class Bitly extends OAuth2
             'POST',
             $this->resourceEndpoint . 'oauth/access_token',
             ["Content-Type: application/x-www-form-urlencoded"],
-            http_build_query([
+            \http_build_query([
                 "client_id" => $this->appID,
                 "client_secret" => $this->appSecret,
                 "code" => $code,
                 "redirect_uri" => $this->callback,
-                "state" => json_encode($this->state)
+                "state" => \json_encode($this->state)
             ])
         );
 
         $result = null;
 
         if ($response) {
-            parse_str($response, $result);
+            \parse_str($response, $result);
             return $result['access_token'];
         }
 
@@ -137,12 +137,12 @@ class Bitly extends OAuth2
     protected function getUser(string $accessToken)
     {
         $headers = [
-            'Authorization: Bearer '. urlencode($accessToken),
+            'Authorization: Bearer '. \urlencode($accessToken),
             "Accept: application/json"
         ];
 
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET', $this->resourceEndpoint . "v4/user", $headers), true);
+            $this->user = \json_decode($this->request('GET', $this->resourceEndpoint . "v4/user", $headers), true);
         }
 
 
diff --git a/src/Appwrite/Auth/OAuth2/Discord.php b/src/Appwrite/Auth/OAuth2/Discord.php
index 9f0320dbf..36bc102ca 100644
--- a/src/Appwrite/Auth/OAuth2/Discord.php
+++ b/src/Appwrite/Auth/OAuth2/Discord.php
@@ -41,11 +41,11 @@ class Discord extends OAuth2
     public function getLoginURL(): string
     {
         $url = $this->endpoint . '/oauth2/authorize?'.
-            http_build_query([
+            \http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'state' => json_encode($this->state),
-                'scope' => implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state),
+                'scope' => \implode(' ', $this->getScopes()),
                 'redirect_uri' => $this->callback
             ]);
 
@@ -63,17 +63,17 @@ class Discord extends OAuth2
             'POST',
             $this->endpoint . '/oauth2/token',
             ['Content-Type: application/x-www-form-urlencoded'],
-            http_build_query([
+            \http_build_query([
                 'grant_type' => 'authorization_code',
                 'code' => $code,
                 'redirect_uri' => $this->callback,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
-                'scope' => implode(' ', $this->scope)
+                'scope' => \implode(' ', $this->scope)
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -141,9 +141,9 @@ class Discord extends OAuth2
             $user = $this->request(
                 'GET',
                 $this->endpoint . '/users/@me',
-                ['Authorization: Bearer '.urlencode($accessToken)]
+                ['Authorization: Bearer '.\urlencode($accessToken)]
             );
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Dropbox.php b/src/Appwrite/Auth/OAuth2/Dropbox.php
index 9d6fac5c7..85567c77e 100644
--- a/src/Appwrite/Auth/OAuth2/Dropbox.php
+++ b/src/Appwrite/Auth/OAuth2/Dropbox.php
@@ -33,10 +33,10 @@ class Dropbox extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://www.dropbox.com/oauth2/authorize?'.http_build_query([
+        return 'https://www.dropbox.com/oauth2/authorize?'.\http_build_query([
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
-                'state' => json_encode($this->state),
+                'state' => \json_encode($this->state),
                 'response_type' => 'code'
         ]);
     }
@@ -53,7 +53,7 @@ class Dropbox extends OAuth2
             'POST',
             'https://api.dropboxapi.com/oauth2/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
@@ -62,7 +62,7 @@ class Dropbox extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -127,9 +127,9 @@ class Dropbox extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $headers[] = 'Authorization: Bearer '. urlencode($accessToken);
+            $headers[] = 'Authorization: Bearer '. \urlencode($accessToken);
             $user = $this->request('POST', 'https://api.dropboxapi.com/2/users/get_current_account', $headers);
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Facebook.php b/src/Appwrite/Auth/OAuth2/Facebook.php
index 673ec7f4c..6a2982242 100644
--- a/src/Appwrite/Auth/OAuth2/Facebook.php
+++ b/src/Appwrite/Auth/OAuth2/Facebook.php
@@ -36,11 +36,11 @@ class Facebook extends OAuth2
      */
     public function getLoginURL():string
     {
-        return 'https://www.facebook.com/'.$this->version.'/dialog/oauth?'.http_build_query([
+        return 'https://www.facebook.com/'.$this->version.'/dialog/oauth?'.\http_build_query([
             'client_id'=> $this->appID,
             'redirect_uri' => $this->callback,
-            'scope' => implode(' ', $this->getScopes()),
-            'state' => json_encode($this->state)
+            'scope' => \implode(' ', $this->getScopes()),
+            'state' => \json_encode($this->state)
         ]);
     }
 
@@ -53,7 +53,7 @@ class Facebook extends OAuth2
     {
         $accessToken = $this->request(
             'GET',
-            'https://graph.facebook.com/'.$this->version.'/oauth/access_token?'.http_build_query([
+            'https://graph.facebook.com/'.$this->version.'/oauth/access_token?'.\http_build_query([
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
                 'client_secret' => $this->appSecret,
@@ -61,7 +61,7 @@ class Facebook extends OAuth2
             ])  
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -126,9 +126,9 @@ class Facebook extends OAuth2
     protected function getUser(string $accessToken):array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://graph.facebook.com/'.$this->version.'/me?fields=email,name&access_token='.urlencode($accessToken));
+            $user = $this->request('GET', 'https://graph.facebook.com/'.$this->version.'/me?fields=email,name&access_token='.\urlencode($accessToken));
 
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/GitHub.php b/src/Appwrite/Auth/OAuth2/GitHub.php
index 445740928..9f571da3a 100644
--- a/src/Appwrite/Auth/OAuth2/GitHub.php
+++ b/src/Appwrite/Auth/OAuth2/GitHub.php
@@ -31,11 +31,11 @@ class Github extends OAuth2
      */
     public function getLoginURL():string
     {
-        return 'https://github.com/login/oauth/authorize?'. http_build_query([
+        return 'https://github.com/login/oauth/authorize?'. \http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'scope' => implode(' ', $this->getScopes()),
-            'state' => json_encode($this->state)
+            'scope' => \implode(' ', $this->getScopes()),
+            'state' => \json_encode($this->state)
         ]);
 
     }
@@ -51,7 +51,7 @@ class Github extends OAuth2
             'POST',
             'https://github.com/login/oauth/access_token',
             [],
-            http_build_query([
+            \http_build_query([
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
                 'client_secret' => $this->appSecret,
@@ -61,7 +61,7 @@ class Github extends OAuth2
 
         $output = [];
 
-        parse_str($accessToken, $output);
+        \parse_str($accessToken, $output);
 
         if (isset($output['access_token'])) {
             return $output['access_token'];
@@ -93,7 +93,7 @@ class Github extends OAuth2
      */
     public function getUserEmail(string $accessToken):string
     {
-        $emails = json_decode($this->request('GET', 'https://api.github.com/user/emails', ['Authorization: token '.urlencode($accessToken)]), true);
+        $emails = \json_decode($this->request('GET', 'https://api.github.com/user/emails', ['Authorization: token '.\urlencode($accessToken)]), true);
 
         foreach ($emails as $email) {
             if ($email['primary'] && $email['verified']) {
@@ -128,7 +128,7 @@ class Github extends OAuth2
     protected function getUser(string $accessToken)
     {
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET', 'https://api.github.com/user', ['Authorization: token '.urlencode($accessToken)]), true);
+            $this->user = \json_decode($this->request('GET', 'https://api.github.com/user', ['Authorization: token '.\urlencode($accessToken)]), true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Gitlab.php b/src/Appwrite/Auth/OAuth2/Gitlab.php
index fb5a3b9c4..93f27db51 100644
--- a/src/Appwrite/Auth/OAuth2/Gitlab.php
+++ b/src/Appwrite/Auth/OAuth2/Gitlab.php
@@ -34,11 +34,11 @@ class Gitlab extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://gitlab.com/oauth/authorize?'.http_build_query([
+        return 'https://gitlab.com/oauth/authorize?'.\http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'scope' => implode(' ', $this->getScopes()),
-            'state' => json_encode($this->state),
+            'scope' => \implode(' ', $this->getScopes()),
+            'state' => \json_encode($this->state),
             'response_type' => 'code'
         ]);
     }
@@ -52,7 +52,7 @@ class Gitlab extends OAuth2
     {
         $accessToken = $this->request(
             'POST',
-            'https://gitlab.com/oauth/token?'.http_build_query([
+            'https://gitlab.com/oauth/token?'.\http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
@@ -61,7 +61,7 @@ class Gitlab extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -126,8 +126,8 @@ class Gitlab extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://gitlab.com/api/v4/user?access_token='.urlencode($accessToken));
-            $this->user = json_decode($user, true);
+            $user = $this->request('GET', 'https://gitlab.com/api/v4/user?access_token='.\urlencode($accessToken));
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Google.php b/src/Appwrite/Auth/OAuth2/Google.php
index 068ad493b..2f4a4febc 100644
--- a/src/Appwrite/Auth/OAuth2/Google.php
+++ b/src/Appwrite/Auth/OAuth2/Google.php
@@ -43,11 +43,11 @@ class Google extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://accounts.google.com/o/oauth2/v2/auth?'. http_build_query([
+        return 'https://accounts.google.com/o/oauth2/v2/auth?'. \http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'scope' => implode(' ', $this->getScopes()),
-            'state' => json_encode($this->state),
+            'scope' => \implode(' ', $this->getScopes()),
+            'state' => \json_encode($this->state),
             'response_type' => 'code'
         ]);
     }
@@ -61,7 +61,7 @@ class Google extends OAuth2
     {
         $accessToken = $this->request(
             'POST',
-            'https://oauth2.googleapis.com/token?'.http_build_query([
+            'https://oauth2.googleapis.com/token?'.\http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
@@ -71,7 +71,7 @@ class Google extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -136,8 +136,8 @@ class Google extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://www.googleapis.com/oauth2/v2/userinfo?access_token='.urlencode($accessToken));
-            $this->user = json_decode($user, true);
+            $user = $this->request('GET', 'https://www.googleapis.com/oauth2/v2/userinfo?access_token='.\urlencode($accessToken));
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/LinkedIn.php b/src/Appwrite/Auth/OAuth2/LinkedIn.php
index 46c553ffc..d2315980b 100644
--- a/src/Appwrite/Auth/OAuth2/LinkedIn.php
+++ b/src/Appwrite/Auth/OAuth2/LinkedIn.php
@@ -45,12 +45,12 @@ class LinkedIn extends OAuth2
      */
     public function getLoginURL():string
     {
-        return 'https://www.linkedin.com/oauth/v2/authorization?'.http_build_query([
+        return 'https://www.linkedin.com/oauth/v2/authorization?'.\http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
-                'scope' => implode(' ', $this->getScopes()),
-                'state' => json_encode($this->state),
+                'scope' => \implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state),
             ]);
     }
 
@@ -65,7 +65,7 @@ class LinkedIn extends OAuth2
             'POST',
             'https://www.linkedin.com/oauth/v2/accessToken',
             ['Content-Type: application/x-www-form-urlencoded'],
-            http_build_query([
+            \http_build_query([
                 'grant_type' => 'authorization_code',
                 'code' => $code,
                 'redirect_uri' => $this->callback,
@@ -74,7 +74,7 @@ class LinkedIn extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -106,7 +106,7 @@ class LinkedIn extends OAuth2
      */
     public function getUserEmail(string $accessToken):string
     {
-        $email = json_decode($this->request('GET', 'https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))', ['Authorization: Bearer '.urlencode($accessToken)]), true);
+        $email = \json_decode($this->request('GET', 'https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))', ['Authorization: Bearer '.\urlencode($accessToken)]), true);
 
         if (
             isset($email['elements']) &&
@@ -149,7 +149,7 @@ class LinkedIn extends OAuth2
     protected function getUser(string $accessToken)
     {
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET', 'https://api.linkedin.com/v2/me', ['Authorization: Bearer '.urlencode($accessToken)]), true);
+            $this->user = \json_decode($this->request('GET', 'https://api.linkedin.com/v2/me', ['Authorization: Bearer '.\urlencode($accessToken)]), true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Microsoft.php b/src/Appwrite/Auth/OAuth2/Microsoft.php
index 86f435ac3..8f543c796 100644
--- a/src/Appwrite/Auth/OAuth2/Microsoft.php
+++ b/src/Appwrite/Auth/OAuth2/Microsoft.php
@@ -36,11 +36,11 @@ class Microsoft extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize?'.http_build_query([
+        return 'https://login.microsoftonline.com/common/oauth2/v2.0/authorize?'.\http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'state'=> json_encode($this->state),
-            'scope'=> implode(' ', $this->getScopes()),
+            'state'=> \json_encode($this->state),
+            'scope'=> \implode(' ', $this->getScopes()),
             'response_type' => 'code',
             'response_mode' => 'query'
         ]);
@@ -59,17 +59,17 @@ class Microsoft extends OAuth2
             'POST',
             'https://login.microsoftonline.com/common/oauth2/v2.0/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
                 'redirect_uri' => $this->callback,
-                'scope' => implode(' ', $this->getScopes()),
+                'scope' => \implode(' ', $this->getScopes()),
                 'grant_type' => 'authorization_code'
             ])
         );
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -134,9 +134,9 @@ class Microsoft extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $headers[] = 'Authorization: Bearer '. urlencode($accessToken);
+            $headers[] = 'Authorization: Bearer '. \urlencode($accessToken);
             $user = $this->request('GET', 'https://graph.microsoft.com/v1.0/me', $headers);
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Mock.php b/src/Appwrite/Auth/OAuth2/Mock.php
index 9f931b957..e1744343f 100644
--- a/src/Appwrite/Auth/OAuth2/Mock.php
+++ b/src/Appwrite/Auth/OAuth2/Mock.php
@@ -36,11 +36,11 @@ class Mock extends OAuth2
      */
     public function getLoginURL():string
     {
-        return 'http://localhost/'.$this->version.'/mock/tests/general/oauth2?'. http_build_query([
+        return 'http://localhost/'.$this->version.'/mock/tests/general/oauth2?'. \http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
-            'scope' => implode(' ', $this->getScopes()),
-            'state' => json_encode($this->state)
+            'scope' => \implode(' ', $this->getScopes()),
+            'state' => \json_encode($this->state)
         ]);
     }
 
@@ -54,7 +54,7 @@ class Mock extends OAuth2
         $accessToken = $this->request(
             'GET',
             'http://localhost/'.$this->version.'/mock/tests/general/oauth2/token?'.
-            http_build_query([
+            \http_build_query([
                 'client_id' => $this->appID,
                 'redirect_uri' => $this->callback,
                 'client_secret' => $this->appSecret,
@@ -62,7 +62,7 @@ class Mock extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true); //
+        $accessToken = \json_decode($accessToken, true); //
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -127,9 +127,9 @@ class Mock extends OAuth2
     protected function getUser(string $accessToken):array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'http://localhost/'.$this->version.'/mock/tests/general/oauth2/user?token='.urlencode($accessToken));
+            $user = $this->request('GET', 'http://localhost/'.$this->version.'/mock/tests/general/oauth2/user?token='.\urlencode($accessToken));
 
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Paypal.php b/src/Appwrite/Auth/OAuth2/Paypal.php
index b87973c48..ef05a1aff 100644
--- a/src/Appwrite/Auth/OAuth2/Paypal.php
+++ b/src/Appwrite/Auth/OAuth2/Paypal.php
@@ -50,14 +50,14 @@ class Paypal extends OAuth2
     public function getLoginURL(): string
     {
         $url = $this->endpoint[$this->environment] . 'connect/?'.
-            http_build_query([
+            \http_build_query([
                 'flowEntry' => 'static',
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
+                'scope' => \implode(' ', $this->getScopes()),
                 // paypal is not accepting localhost string into return uri
-                'redirect_uri' => str_replace("localhost", "127.0.0.1", $this->callback),
-                'state' => json_encode($this->state),
+                'redirect_uri' => \str_replace("localhost", "127.0.0.1", $this->callback),
+                'state' => \json_encode($this->state),
             ]);
 
         return $url;
@@ -73,15 +73,15 @@ class Paypal extends OAuth2
         $accessToken = $this->request(
             'POST',
             $this->resourceEndpoint[$this->environment] . 'oauth2/token',
-            ['Authorization: Basic ' . base64_encode($this->appID . ':' . $this->appSecret)],
-            http_build_query([
+            ['Authorization: Basic ' . \base64_encode($this->appID . ':' . $this->appSecret)],
+            \http_build_query([
                 'code' => $code,
                 'grant_type' => 'authorization_code',
             ])
         );
 
 
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
 
         if (isset($accessToken['access_token'])) {
@@ -148,7 +148,7 @@ class Paypal extends OAuth2
     {
         $header = [
             'Content-Type: application/json',
-            'Authorization: Bearer '.urlencode($accessToken),
+            'Authorization: Bearer '.\urlencode($accessToken),
         ];
         if (empty($this->user)) {
             $user = $this->request(
@@ -156,7 +156,7 @@ class Paypal extends OAuth2
                 $this->resourceEndpoint[$this->environment] . 'identity/oauth2/userinfo?schema=paypalv1.1',
                 $header
             );
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Salesforce.php b/src/Appwrite/Auth/OAuth2/Salesforce.php
index 478e05529..7e6467d33 100644
--- a/src/Appwrite/Auth/OAuth2/Salesforce.php
+++ b/src/Appwrite/Auth/OAuth2/Salesforce.php
@@ -38,7 +38,7 @@ class Salesforce extends OAuth2
      */
     public function parseState(string $state)
     {
-        return json_decode(html_entity_decode($state), true);
+        return \json_decode(\html_entity_decode($state), true);
     }
 
 
@@ -47,12 +47,12 @@ class Salesforce extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://login.salesforce.com/services/oauth2/authorize?'.http_build_query([
+        return 'https://login.salesforce.com/services/oauth2/authorize?'.\http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
                 'redirect_uri'=> $this->callback,
-                'scope'=> implode(' ', $this->getScopes()),
-                'state' => json_encode($this->state)
+                'scope'=> \implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -64,7 +64,7 @@ class Salesforce extends OAuth2
     public function getAccessToken(string $code): string
     {
         $headers = [
-            "Authorization: Basic " . base64_encode($this->appID . ":" . $this->appSecret),
+            "Authorization: Basic " . \base64_encode($this->appID . ":" . $this->appSecret),
             "Content-Type: application/x-www-form-urlencoded",
         ];
 
@@ -72,13 +72,13 @@ class Salesforce extends OAuth2
             'POST',
             'https://login.salesforce.com/services/oauth2/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'redirect_uri' => $this->callback ,
                 'grant_type' => 'authorization_code'
             ])
         );
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -143,8 +143,8 @@ class Salesforce extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://login.salesforce.com/services/oauth2/userinfo?access_token='.urlencode($accessToken));
-            $this->user = json_decode($user, true);
+            $user = $this->request('GET', 'https://login.salesforce.com/services/oauth2/userinfo?access_token='.\urlencode($accessToken));
+            $this->user = \json_decode($user, true);
         }
         return $this->user;
     }
diff --git a/src/Appwrite/Auth/OAuth2/Slack.php b/src/Appwrite/Auth/OAuth2/Slack.php
index 87d562655..684804686 100644
--- a/src/Appwrite/Auth/OAuth2/Slack.php
+++ b/src/Appwrite/Auth/OAuth2/Slack.php
@@ -35,11 +35,11 @@ class Slack extends OAuth2
     public function getLoginURL():string
     {
         // https://api.slack.com/docs/oauth#step_1_-_sending_users_to_authorize_and_or_install
-        return 'https://slack.com/oauth/authorize?'.http_build_query([
+        return 'https://slack.com/oauth/authorize?'.\http_build_query([
             'client_id'=> $this->appID,
-            'scope' => implode(' ', $this->getScopes()),
+            'scope' => \implode(' ', $this->getScopes()),
             'redirect_uri' => $this->callback,
-            'state' => json_encode($this->state)
+            'state' => \json_encode($this->state)
         ]);
     }
 
@@ -53,7 +53,7 @@ class Slack extends OAuth2
         // https://api.slack.com/docs/oauth#step_3_-_exchanging_a_verification_code_for_an_access_token
         $accessToken = $this->request(
             'GET',
-            'https://slack.com/api/oauth.access?'.http_build_query([
+            'https://slack.com/api/oauth.access?'.\http_build_query([
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
                 'code' => $code,
@@ -61,7 +61,7 @@ class Slack extends OAuth2
             ])
         );
 
-        $accessToken = json_decode($accessToken, true); //
+        $accessToken = \json_decode($accessToken, true); //
 
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -130,10 +130,10 @@ class Slack extends OAuth2
             // https://api.slack.com/methods/users.identity
             $user = $this->request(
                 'GET',
-                'https://slack.com/api/users.identity?token='.urlencode($accessToken)
+                'https://slack.com/api/users.identity?token='.\urlencode($accessToken)
             );
 
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Spotify.php b/src/Appwrite/Auth/OAuth2/Spotify.php
index bb3fafd4e..1bc3d5190 100644
--- a/src/Appwrite/Auth/OAuth2/Spotify.php
+++ b/src/Appwrite/Auth/OAuth2/Spotify.php
@@ -46,12 +46,12 @@ class Spotify extends OAuth2
     public function getLoginURL():string
     {
         return $this->endpoint . 'authorize?'.
-            http_build_query([
+            \http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
+                'scope' => \implode(' ', $this->getScopes()),
                 'redirect_uri' => $this->callback,
-                'state' => json_encode($this->state)
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -62,12 +62,12 @@ class Spotify extends OAuth2
      */
     public function getAccessToken(string $code):string
     {
-        $header = "Authorization: Basic " . base64_encode($this->appID . ":" . $this->appSecret);
-        $result = json_decode($this->request(
+        $header = "Authorization: Basic " . \base64_encode($this->appID . ":" . $this->appSecret);
+        $result = \json_decode($this->request(
             'POST',
             $this->endpoint . 'api/token',
             [$header],
-            http_build_query([
+            \http_build_query([
                 "code" => $code,
                 "grant_type" => "authorization_code",
                 "redirect_uri" => $this->callback
@@ -137,8 +137,8 @@ class Spotify extends OAuth2
     protected function getUser(string $accessToken)
     {
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET',
-                $this->resourceEndpoint . "me", ['Authorization: Bearer '.urlencode($accessToken)]), true);
+            $this->user = \json_decode($this->request('GET',
+                $this->resourceEndpoint . "me", ['Authorization: Bearer '.\urlencode($accessToken)]), true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Twitch.php b/src/Appwrite/Auth/OAuth2/Twitch.php
index fa7adfcd1..94f735b50 100644
--- a/src/Appwrite/Auth/OAuth2/Twitch.php
+++ b/src/Appwrite/Auth/OAuth2/Twitch.php
@@ -46,13 +46,13 @@ class Twitch extends OAuth2
     public function getLoginURL():string
     {
         return $this->endpoint . 'authorize?'.
-            http_build_query([
+            \http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
+                'scope' => \implode(' ', $this->getScopes()),
                 'redirect_uri' => $this->callback,
                 'force_verify' => true,
-                'state' => json_encode($this->state)
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -63,11 +63,11 @@ class Twitch extends OAuth2
      */
     public function getAccessToken(string $code):string
     {
-        $result = json_decode($this->request(
+        $result = \json_decode($this->request(
             'POST',
             $this->endpoint . 'token',
             [],
-            http_build_query([
+            \http_build_query([
                 "client_id" => $this->appID,
                 "client_secret" => $this->appSecret,
                 "code" => $code,
@@ -139,8 +139,8 @@ class Twitch extends OAuth2
     protected function getUser(string $accessToken)
     {
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET',
-                $this->resourceEndpoint, ['Authorization: Bearer '.urlencode($accessToken)]), true)['data']['0'];
+            $this->user = \json_decode($this->request('GET',
+                $this->resourceEndpoint, ['Authorization: Bearer '.\urlencode($accessToken)]), true)['data']['0'];
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Vk.php b/src/Appwrite/Auth/OAuth2/Vk.php
index 6e9d6fcf7..11e1fd4f0 100644
--- a/src/Appwrite/Auth/OAuth2/Vk.php
+++ b/src/Appwrite/Auth/OAuth2/Vk.php
@@ -44,13 +44,13 @@ class Vk extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://oauth.vk.com/authorize?' . http_build_query([
+        return 'https://oauth.vk.com/authorize?' . \http_build_query([
             'client_id' => $this->appID,
             'redirect_uri' => $this->callback,
             'response_type' => 'code',
-            'state' => json_encode($this->state),
+            'state' => \json_encode($this->state),
             'v' => $this->version,
-            'scope' => implode(' ', $this->getScopes())
+            'scope' => \implode(' ', $this->getScopes())
         ]);
     }
 
@@ -66,14 +66,14 @@ class Vk extends OAuth2
             'POST',
             'https://oauth.vk.com/access_token?',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'client_id' => $this->appID,
                 'client_secret' => $this->appSecret,
                 'redirect_uri' => $this->callback
             ])
         );
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
 
         if (isset($accessToken['email'])) {
             $this->user['email'] = $accessToken['email'];
@@ -147,14 +147,14 @@ class Vk extends OAuth2
         if (empty($this->user['name'])) {
             $user = $this->request(
                 'GET',
-                'https://api.vk.com/method/users.get?'. http_build_query([
+                'https://api.vk.com/method/users.get?'. \http_build_query([
                     'v' => $this->version,
                     'fields' => 'id,name,email,first_name,last_name',
                     'access_token' => $accessToken
                 ])
             );
             
-            $user = json_decode($user, true);
+            $user = \json_decode($user, true);
             $this->user['name'] = $user['response'][0]['first_name'] ." ".$user['response'][0]['last_name'];
         }
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Yahoo.php b/src/Appwrite/Auth/OAuth2/Yahoo.php
index 46d83f18c..41100132f 100644
--- a/src/Appwrite/Auth/OAuth2/Yahoo.php
+++ b/src/Appwrite/Auth/OAuth2/Yahoo.php
@@ -49,7 +49,7 @@ class Yahoo extends OAuth2
      */
     public function parseState(string $state)
     {
-        return json_decode(html_entity_decode($state), true);
+        return \json_decode(\html_entity_decode($state), true);
     }
 
     /**
@@ -58,12 +58,12 @@ class Yahoo extends OAuth2
     public function getLoginURL():string
     {
         return $this->endpoint . 'request_auth?'.
-            http_build_query([
+            \http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope' => implode(' ', $this->getScopes()),
+                'scope' => \implode(' ', $this->getScopes()),
                 'redirect_uri' => $this->callback,
-                'state' => json_encode($this->state)
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -75,15 +75,15 @@ class Yahoo extends OAuth2
     public function getAccessToken(string $code):string
     {
         $header = [
-            "Authorization: Basic " . base64_encode($this->appID . ":" . $this->appSecret),
+            "Authorization: Basic " . \base64_encode($this->appID . ":" . $this->appSecret),
             "Content-Type: application/x-www-form-urlencoded",
         ];
 
-        $result = json_decode($this->request(
+        $result = \json_decode($this->request(
             'POST',
             $this->endpoint . 'get_token',
             $header,
-            http_build_query([
+            \http_build_query([
                 "code" => $code,
                 "grant_type" => "authorization_code",
                 "redirect_uri" => $this->callback
@@ -153,8 +153,8 @@ class Yahoo extends OAuth2
     protected function getUser(string $accessToken)
     {
         if (empty($this->user)) {
-            $this->user = json_decode($this->request('GET',
-                $this->resourceEndpoint, ['Authorization: Bearer '.urlencode($accessToken)]), true);
+            $this->user = \json_decode($this->request('GET',
+                $this->resourceEndpoint, ['Authorization: Bearer '.\urlencode($accessToken)]), true);
         }
 
         return $this->user;
diff --git a/src/Appwrite/Auth/OAuth2/Yandex.php b/src/Appwrite/Auth/OAuth2/Yandex.php
index 138862d18..7955d33fd 100644
--- a/src/Appwrite/Auth/OAuth2/Yandex.php
+++ b/src/Appwrite/Auth/OAuth2/Yandex.php
@@ -36,7 +36,7 @@ class Yandex extends OAuth2
      */
     public function parseState(string $state)
     {
-        return json_decode(html_entity_decode($state), true);
+        return \json_decode(\html_entity_decode($state), true);
     }
 
 
@@ -45,11 +45,11 @@ class Yandex extends OAuth2
      */
     public function getLoginURL(): string
     {
-        return 'https://oauth.yandex.com/authorize?'.http_build_query([
+        return 'https://oauth.yandex.com/authorize?'.\http_build_query([
                 'response_type' => 'code',
                 'client_id' => $this->appID,
-                'scope'=> implode(' ', $this->getScopes()),
-                'state' => json_encode($this->state)
+                'scope'=> \implode(' ', $this->getScopes()),
+                'state' => \json_encode($this->state)
             ]);
     }
 
@@ -61,7 +61,7 @@ class Yandex extends OAuth2
     public function getAccessToken(string $code): string
     {
         $headers = [
-            "Authorization: Basic " . base64_encode($this->appID . ":" . $this->appSecret),
+            "Authorization: Basic " . \base64_encode($this->appID . ":" . $this->appSecret),
             "Content-Type: application/x-www-form-urlencoded",
         ];
 
@@ -69,12 +69,12 @@ class Yandex extends OAuth2
             'POST',
             'https://oauth.yandex.com/token',
             $headers,
-            http_build_query([
+            \http_build_query([
                 'code' => $code,
                 'grant_type' => 'authorization_code'
             ])
         );
-        $accessToken = json_decode($accessToken, true);
+        $accessToken = \json_decode($accessToken, true);
         
         if (isset($accessToken['access_token'])) {
             return $accessToken['access_token'];
@@ -139,11 +139,11 @@ class Yandex extends OAuth2
     protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
-            $user = $this->request('GET', 'https://login.yandex.ru/info?'.http_build_query([
+            $user = $this->request('GET', 'https://login.yandex.ru/info?'.\http_build_query([
                 'format' => 'json',
                 'oauth_token' => $accessToken
             ]));
-            $this->user = json_decode($user, true);
+            $this->user = \json_decode($user, true);
         }
         return $this->user;
     }
diff --git a/src/Appwrite/Auth/Validator/Password.php b/src/Appwrite/Auth/Validator/Password.php
index 494da67fb..3afcbe7aa 100644
--- a/src/Appwrite/Auth/Validator/Password.php
+++ b/src/Appwrite/Auth/Validator/Password.php
@@ -34,7 +34,7 @@ class Password extends Validator
      */
     public function isValid($value)
     {
-        if (strlen($value) < 6 || strlen($value) > 32) {
+        if (\strlen($value) < 6 || \strlen($value) > 32) {
             return false;
         }
 
diff --git a/src/Appwrite/Database/Adapter/MySQL.php b/src/Appwrite/Database/Adapter/MySQL.php
index 6c90c64a7..461d2a29e 100644
--- a/src/Appwrite/Database/Adapter/MySQL.php
+++ b/src/Appwrite/Database/Adapter/MySQL.php
@@ -113,11 +113,11 @@ class MySQL extends Adapter
         $output = [
             '$id' => null,
             '$collection' => null,
-            '$permissions' => (!empty($document['permissions'])) ? json_decode($document['permissions'], true) : [],
+            '$permissions' => (!empty($document['permissions'])) ? \json_decode($document['permissions'], true) : [],
         ];
 
         foreach ($properties as &$property) {
-            settype($property['value'], $property['primitive']);
+            \settype($property['value'], $property['primitive']);
 
             if ($property['array']) {
                 $output[$property['key']][] = $property['value'];
@@ -154,9 +154,9 @@ class MySQL extends Adapter
     public function createDocument(array $data = [], array $unique = [])
     {
         $order = 0;
-        $data = array_merge(['$id' => null, '$permissions' => []], $data); // Merge data with default params
-        $signature = md5(json_encode($data, true));
-        $revision = uniqid('', true);
+        $data = \array_merge(['$id' => null, '$permissions' => []], $data); // Merge data with default params
+        $signature = \md5(\json_encode($data, true));
+        $revision = \uniqid('', true);
         $data['$id'] = (empty($data['$id'])) ? null : $data['$id'];
 
         /*
@@ -192,7 +192,7 @@ class MySQL extends Adapter
                 SET `key` = :key;
             ');
             
-            $st->bindValue(':key', md5($data['$collection'].':'.$key.'='.$value), PDO::PARAM_STR);
+            $st->bindValue(':key', \md5($data['$collection'].':'.$key.'='.$value), PDO::PARAM_STR);
 
             if(!$st->execute()) {
                 throw new Duplicate('Duplicated Property: '.$key.'='.$value);
@@ -213,9 +213,9 @@ class MySQL extends Adapter
         $st1->bindValue(':uid', $data['$id'], PDO::PARAM_STR);
         $st1->bindValue(':revision', $revision, PDO::PARAM_STR);
         $st1->bindValue(':signature', $signature, PDO::PARAM_STR);
-        $st1->bindValue(':createdAt', date('Y-m-d H:i:s', time()), PDO::PARAM_STR);
-        $st1->bindValue(':updatedAt', date('Y-m-d H:i:s', time()), PDO::PARAM_STR);
-        $st1->bindValue(':permissions', json_encode($data['$permissions']), PDO::PARAM_STR);
+        $st1->bindValue(':createdAt', \date('Y-m-d H:i:s', \time()), PDO::PARAM_STR);
+        $st1->bindValue(':updatedAt', \date('Y-m-d H:i:s', \time()), PDO::PARAM_STR);
+        $st1->bindValue(':permissions', \json_encode($data['$permissions']), PDO::PARAM_STR);
 
         $st1->execute();
 
@@ -240,7 +240,7 @@ class MySQL extends Adapter
 
         foreach ($data as $key => $value) { // Prepare properties data
 
-            if (in_array($key, ['$permissions'])) {
+            if (\in_array($key, ['$permissions'])) {
                 continue;
             }
 
@@ -292,8 +292,8 @@ class MySQL extends Adapter
         }
 
         foreach ($props as $prop) {
-            if (is_array($prop['value'])) {
-                throw new Exception('Value can\'t be an array: '.json_encode($prop['value']));
+            if (\is_array($prop['value'])) {
+                throw new Exception('Value can\'t be an array: '.\json_encode($prop['value']));
             }
             $st2->bindValue(':documentUid', $data['$id'], PDO::PARAM_STR);
             $st2->bindValue(':documentRevision', $revision, PDO::PARAM_STR);
@@ -481,7 +481,7 @@ class MySQL extends Adapter
      */
     public function getCollection(array $options)
     {
-        $start = microtime(true);
+        $start = \microtime(true);
         $orderCastMap = [
             'int' => 'UNSIGNED',
             'string' => 'CHAR',
@@ -494,11 +494,11 @@ class MySQL extends Adapter
         $options['orderField'] = (empty($options['orderField'])) ? '$id' : $options['orderField']; // Set default order field
         $options['orderCast'] = (empty($options['orderCast'])) ? 'string' : $options['orderCast']; // Set default order field
 
-        if (!array_key_exists($options['orderCast'], $orderCastMap)) {
+        if (!\array_key_exists($options['orderCast'], $orderCastMap)) {
             throw new Exception('Invalid order cast');
         }
 
-        if (!in_array($options['orderType'], $orderTypeMap)) {
+        if (!\in_array($options['orderType'], $orderTypeMap)) {
             throw new Exception('Invalid order type');
         }
 
@@ -514,11 +514,11 @@ class MySQL extends Adapter
             $value = $filter['value'];
             $operator = $filter['operator'];
 
-            $path = explode('.', $key);
+            $path = \explode('.', $key);
             $original = $path;
 
-            if (1 < count($path)) {
-                $key = array_pop($path);
+            if (1 < \count($path)) {
+                $key = \array_pop($path);
             } else {
                 $path = [];
             }
@@ -535,7 +535,7 @@ class MySQL extends Adapter
                 //if($path == "''") { // Handle direct attributes queries
                 $where[] = 'JOIN `'.$this->getNamespace().".database.properties` b{$i} ON a.uid IS NOT NULL AND b{$i}.documentUid = a.uid AND (b{$i}.key = {$key} AND b{$i}.value {$operator} {$value})";
             } else { // Handle direct child attributes queries
-                $len = count($original);
+                $len = \count($original);
                 $prev = 'c'.$i;
 
                 foreach ($original as $y => $part) {
@@ -557,10 +557,10 @@ class MySQL extends Adapter
         }
 
         // Sorting
-        $orderPath = explode('.', $options['orderField']);
-        $len = count($orderPath);
+        $orderPath = \explode('.', $options['orderField']);
+        $len = \count($orderPath);
         $orderKey = 'order_b';
-        $part = $this->getPDO()->quote(implode('', $orderPath), PDO::PARAM_STR);
+        $part = $this->getPDO()->quote(\implode('', $orderPath), PDO::PARAM_STR);
         $orderSelect = "CASE WHEN {$orderKey}.key = {$part} THEN CAST({$orderKey}.value AS {$orderCastMap[$options['orderCast']]}) END AS sort_ff";
 
         if (1 === $len) {
@@ -606,9 +606,9 @@ class MySQL extends Adapter
         }
 
         $select = 'DISTINCT a.uid';
-        $where = implode("\n", $where);
-        $join = implode("\n", $join);
-        $sorts = implode("\n", $sorts);
+        $where = \implode("\n", $where);
+        $join = \implode("\n", $join);
+        $sorts = \implode("\n", $sorts);
         $range = "LIMIT {$options['offset']}, {$options['limit']}";
         $roles = [];
 
@@ -624,10 +624,10 @@ class MySQL extends Adapter
             FROM `".$this->getNamespace().".database.documents` a {$where}{$join}{$sorts}
             WHERE status = 0
                {$search}
-               AND (".implode('||', $roles).")
+               AND (".\implode('||', $roles).")
             ORDER BY sort_ff {$options['orderType']} %s";
 
-        $st = $this->getPDO()->prepare(sprintf($query, $select, $range));
+        $st = $this->getPDO()->prepare(\sprintf($query, $select, $range));
 
         $st->execute();
 
@@ -638,7 +638,7 @@ class MySQL extends Adapter
             $results['data'][] = $node['uid'];
         }
 
-        $count = $this->getPDO()->prepare(sprintf($query, 'count(DISTINCT a.uid) as sum', ''));
+        $count = $this->getPDO()->prepare(\sprintf($query, 'count(DISTINCT a.uid) as sum', ''));
 
         $count->execute();
 
@@ -647,11 +647,11 @@ class MySQL extends Adapter
         $this->resetDebug();
 
         $this
-            ->setDebug('query', preg_replace('/\s+/', ' ', sprintf($query, $select, $range)))
-            ->setDebug('time', microtime(true) - $start)
-            ->setDebug('filters', count($options['filters']))
-            ->setDebug('joins', substr_count($query, 'JOIN'))
-            ->setDebug('count', count($results['data']))
+            ->setDebug('query', \preg_replace('/\s+/', ' ', \sprintf($query, $select, $range)))
+            ->setDebug('time', \microtime(true) - $start)
+            ->setDebug('filters', \count($options['filters']))
+            ->setDebug('joins', \substr_count($query, 'JOIN'))
+            ->setDebug('count', \count($results['data']))
             ->setDebug('sum', (int) $count['sum'])
             ->setDebug('documents', $this->count)
         ;
@@ -670,7 +670,7 @@ class MySQL extends Adapter
      */
     public function getCount(array $options)
     {
-        $start = microtime(true);
+        $start = \microtime(true);
         $where = [];
         $join = [];
 
@@ -680,11 +680,11 @@ class MySQL extends Adapter
             $key = $filter['key'];
             $value = $filter['value'];
             $operator = $filter['operator'];
-            $path = explode('.', $key);
+            $path = \explode('.', $key);
             $original = $path;
 
-            if (1 < count($path)) {
-                $key = array_pop($path);
+            if (1 < \count($path)) {
+                $key = \array_pop($path);
             } else {
                 $path = [];
             }
@@ -696,7 +696,7 @@ class MySQL extends Adapter
                 //if($path == "''") { // Handle direct attributes queries
                 $where[] = 'JOIN `'.$this->getNamespace().".database.properties` b{$i} ON a.uid IS NOT NULL AND b{$i}.documentUid = a.uid AND (b{$i}.key = {$key} AND b{$i}.value {$operator} {$value})";
             } else { // Handle direct child attributes queries
-                $len = count($original);
+                $len = \count($original);
                 $prev = 'c'.$i;
 
                 foreach ($original as $y => $part) {
@@ -714,8 +714,8 @@ class MySQL extends Adapter
             }
         }
 
-        $where = implode("\n", $where);
-        $join = implode("\n", $join);
+        $where = \implode("\n", $where);
+        $join = \implode("\n", $join);
         $func = 'JOIN `'.$this->getNamespace().".database.properties` b_func ON a.uid IS NOT NULL
             AND a.uid = b_func.documentUid
             AND (b_func.key = 'sizeOriginal')";
@@ -732,9 +732,9 @@ class MySQL extends Adapter
         $query = 'SELECT SUM(b_func.value) as result
             FROM `'.$this->getNamespace().".database.documents` a {$where}{$join}{$func}
             WHERE status = 0
-               AND (".implode('||', $roles).')';
+               AND (".\implode('||', $roles).')';
 
-        $st = $this->getPDO()->prepare(sprintf($query));
+        $st = $this->getPDO()->prepare(\sprintf($query));
 
         $st->execute();
 
@@ -743,10 +743,10 @@ class MySQL extends Adapter
         $this->resetDebug();
 
         $this
-            ->setDebug('query', preg_replace('/\s+/', ' ', sprintf($query)))
-            ->setDebug('time', microtime(true) - $start)
-            ->setDebug('filters', count($options['filters']))
-            ->setDebug('joins', substr_count($query, 'JOIN'))
+            ->setDebug('query', \preg_replace('/\s+/', ' ', \sprintf($query)))
+            ->setDebug('time', \microtime(true) - $start)
+            ->setDebug('filters', \count($options['filters']))
+            ->setDebug('joins', \substr_count($query, 'JOIN'))
         ;
 
         return (int) (isset($result['result'])) ? $result['result'] : 0;
@@ -757,7 +757,7 @@ class MySQL extends Adapter
      */
     public function getId()
     {
-        $unique = uniqid();
+        $unique = \uniqid();
         $attempts = 5;
 
         for ($i = 1; $i <= $attempts; ++$i) {
@@ -801,7 +801,7 @@ class MySQL extends Adapter
         $operator = null;
 
         foreach ($operatorsMap as $node) {
-            if (strpos($filter, $node) !== false) {
+            if (\strpos($filter, $node) !== false) {
                 $operator = $node;
                 break;
             }
@@ -811,9 +811,9 @@ class MySQL extends Adapter
             throw new Exception('Invalid operator');
         }
 
-        $filter = explode($operator, $filter);
+        $filter = \explode($operator, $filter);
 
-        if (count($filter) != 2) {
+        if (\count($filter) != 2) {
             throw new Exception('Invalid filter expression');
         }
 
@@ -838,7 +838,7 @@ class MySQL extends Adapter
      */
     protected function getDataType($value)
     {
-        switch (gettype($value)) {
+        switch (\gettype($value)) {
 
             case 'string':
                 return self::DATA_TYPE_STRING;
@@ -857,7 +857,7 @@ class MySQL extends Adapter
                 break;
 
             case 'array':
-                if ((bool) count(array_filter(array_keys($value), 'is_string'))) {
+                if ((bool) \count(\array_filter(\array_keys($value), 'is_string'))) {
                     return self::DATA_TYPE_DICTIONARY;
                 }
 
@@ -869,7 +869,7 @@ class MySQL extends Adapter
                 break;
         }
 
-        throw new Exception('Unknown data type: '.$value.' ('.gettype($value).')');
+        throw new Exception('Unknown data type: '.$value.' ('.\gettype($value).')');
     }
 
     /**
diff --git a/src/Appwrite/Database/Adapter/Redis.php b/src/Appwrite/Database/Adapter/Redis.php
index 38a70b32e..15a7a887d 100644
--- a/src/Appwrite/Database/Adapter/Redis.php
+++ b/src/Appwrite/Database/Adapter/Redis.php
@@ -42,11 +42,11 @@ class Redis extends Adapter
      */
     public function getDocument($id)
     {
-        $output = json_decode($this->getRedis()->get($this->getNamespace().':document-'.$id), true);
+        $output = \json_decode($this->getRedis()->get($this->getNamespace().':document-'.$id), true);
 
         if (!$output) {
             $output = $this->adapter->getDocument($id);
-            $this->getRedis()->set($this->getNamespace().':document-'.$id, json_encode($output, JSON_UNESCAPED_UNICODE));
+            $this->getRedis()->set($this->getNamespace().':document-'.$id, \json_encode($output, JSON_UNESCAPED_UNICODE));
         }
 
         $output = $this->parseRelations($output);
@@ -78,7 +78,7 @@ class Redis extends Adapter
         foreach ($output['temp-relations'] as $i => $relationship) {
             $node = $relationship['end'];
 
-            $node = (!empty($nodes[$i])) ? $this->parseRelations(json_decode($nodes[$i], true)) : $this->getDocument($node);
+            $node = (!empty($nodes[$i])) ? $this->parseRelations(\json_decode($nodes[$i], true)) : $this->getDocument($node);
 
             if (empty($node)) {
                 continue;
@@ -196,7 +196,7 @@ class Redis extends Adapter
         $nodes = (!empty($keys)) ? $this->getRedis()->mget($keys) : [];
 
         foreach ($data as $i => &$node) {
-            $temp = (!empty($nodes[$i])) ? $this->parseRelations(json_decode($nodes[$i], true)) : $this->getDocument($node);
+            $temp = (!empty($nodes[$i])) ? $this->parseRelations(\json_decode($nodes[$i], true)) : $this->getDocument($node);
 
             if (!empty($temp)) {
                 $node = $temp;
diff --git a/src/Appwrite/Database/Database.php b/src/Appwrite/Database/Database.php
index 6540c2f25..e75eb01b5 100644
--- a/src/Appwrite/Database/Database.php
+++ b/src/Appwrite/Database/Database.php
@@ -122,7 +122,7 @@ class Database
      */
     public function getCollection(array $options)
     {
-        $options = array_merge([
+        $options = \array_merge([
             'offset' => 0,
             'limit' => 15,
             'search' => '',
@@ -142,11 +142,11 @@ class Database
         }
 
         if ($options['first']) {
-            $results = reset($results);
+            $results = \reset($results);
         }
 
         if ($options['last']) {
-            $results = end($results);
+            $results = \end($results);
         }
 
         return $results;
@@ -160,7 +160,7 @@ class Database
      */
     public function getDocument($id, $mock = true)
     {
-        if (is_null($id)) {
+        if (\is_null($id)) {
             return new Document([]);
         }
 
@@ -322,7 +322,7 @@ class Database
      */
     public function getCount(array $options)
     {
-        $options = array_merge([
+        $options = \array_merge([
             'filters' => [],
         ], $options);
 
diff --git a/src/Appwrite/Database/Document.php b/src/Appwrite/Database/Document.php
index ef4ee57f6..a0445702e 100644
--- a/src/Appwrite/Database/Document.php
+++ b/src/Appwrite/Database/Document.php
@@ -24,7 +24,7 @@ class Document extends ArrayObject
     public function __construct($input = null, $flags = 0, $iterator_class = 'ArrayIterator')
     {
         foreach ($input as $key => &$value) {
-            if (is_array($value)) {
+            if (\is_array($value)) {
                 if (isset($value['$id']) || isset($value['$collection'])) {
                     $input[$key] = new self($value);
                 } else {
@@ -76,7 +76,7 @@ class Document extends ArrayObject
      */
     public function getAttribute($name, $default = null)
     {
-        $name = explode('.', $name);
+        $name = \explode('.', $name);
 
         $temp = &$this;
 
@@ -109,12 +109,12 @@ class Document extends ArrayObject
                 $this[$key] = $value;
                 break;
             case self::SET_TYPE_APPEND:
-                $this[$key] = (!isset($this[$key]) || !is_array($this[$key])) ? [] : $this[$key];
-                array_push($this[$key], $value);
+                $this[$key] = (!isset($this[$key]) || !\is_array($this[$key])) ? [] : $this[$key];
+                \array_push($this[$key], $value);
                 break;
             case self::SET_TYPE_PREPEND:
-                $this[$key] = (!isset($this[$key]) || !is_array($this[$key])) ? [] : $this[$key];
-                array_unshift($this[$key], $value);
+                $this[$key] = (!isset($this[$key]) || !\is_array($this[$key])) ? [] : $this[$key];
+                \array_unshift($this[$key], $value);
                 break;
         }
 
@@ -154,15 +154,15 @@ class Document extends ArrayObject
      */
     public function search($key, $value, $scope = null)
     {
-        $array = (!is_null($scope)) ? $scope : $this;
+        $array = (!\is_null($scope)) ? $scope : $this;
 
-        if (is_array($array)  || $array instanceof self) {
+        if (\is_array($array)  || $array instanceof self) {
             if (isset($array[$key]) && $array[$key] == $value) {
                 return $array;
             }
 
             foreach ($array as $k => $v) {
-                if ((is_array($v) || $v instanceof self) && (!empty($v))) {
+                if ((\is_array($v) || $v instanceof self) && (!empty($v))) {
                     $result = $this->search($key, $value, $v);
 
                     if (!empty($result)) {
@@ -210,17 +210,17 @@ class Document extends ArrayObject
         $output = array();
 
         foreach ($array as $key => &$value) {
-            if (!empty($whitelist) && !in_array($key, $whitelist)) { // Export only whitelisted fields
+            if (!empty($whitelist) && !\in_array($key, $whitelist)) { // Export only whitelisted fields
                 continue;
             }
 
-            if (!empty($blacklist) && in_array($key, $blacklist)) { // Don't export blacklisted fields
+            if (!empty($blacklist) && \in_array($key, $blacklist)) { // Don't export blacklisted fields
                 continue;
             }
 
             if ($value instanceof self) {
                 $output[$key] = $value->getArrayCopy($whitelist, $blacklist);
-            } elseif (is_array($value)) {
+            } elseif (\is_array($value)) {
                 foreach ($value as $childKey => &$child) {
                     if ($child instanceof self) {
                         $output[$key][$childKey] = $child->getArrayCopy($whitelist, $blacklist);
diff --git a/src/Appwrite/Database/Validator/Authorization.php b/src/Appwrite/Database/Validator/Authorization.php
index 3d556e0bd..3225251bb 100644
--- a/src/Appwrite/Database/Validator/Authorization.php
+++ b/src/Appwrite/Database/Validator/Authorization.php
@@ -75,14 +75,14 @@ class Authorization extends Validator
         $permission = null;
 
         foreach ($permissions[$this->action] as $permission) {
-            $permission = str_replace(':{self}', ':'.$this->document->getId(), $permission);
+            $permission = \str_replace(':{self}', ':'.$this->document->getId(), $permission);
 
-            if (in_array($permission, self::getRoles())) {
+            if (\in_array($permission, self::getRoles())) {
                 return true;
             }
         }
 
-        $this->message = 'User is missing '.$this->action.' for "'.$permission.'" permission. Only this scopes "'.json_encode(self::getRoles()).'" is given and only this are allowed "'.json_encode($permissions[$this->action]).'".';
+        $this->message = 'User is missing '.$this->action.' for "'.$permission.'" permission. Only this scopes "'.\json_encode(self::getRoles()).'" is given and only this are allowed "'.\json_encode($permissions[$this->action]).'".';
 
         return false;
     }
diff --git a/src/Appwrite/Database/Validator/Collection.php b/src/Appwrite/Database/Validator/Collection.php
index d2a044275..5f8c81dc8 100644
--- a/src/Appwrite/Database/Validator/Collection.php
+++ b/src/Appwrite/Database/Validator/Collection.php
@@ -38,16 +38,16 @@ class Collection extends Structure
     public function isValid($document)
     {
         $document = new Document(
-            array_merge($this->merge, ($document instanceof Document) ? $document->getArrayCopy() : $document)
+            \array_merge($this->merge, ($document instanceof Document) ? $document->getArrayCopy() : $document)
         );
 
-        if (is_null($document->getCollection())) {
+        if (\is_null($document->getCollection())) {
             $this->message = 'Missing collection attribute $collection';
 
             return false;
         }
 
-        if (!in_array($document->getCollection(), $this->collections)) {
+        if (!\in_array($document->getCollection(), $this->collections)) {
             $this->message = 'Collection is not allowed';
 
             return false;
diff --git a/src/Appwrite/Database/Validator/Key.php b/src/Appwrite/Database/Validator/Key.php
index f6cc7ce91..a71425a52 100644
--- a/src/Appwrite/Database/Validator/Key.php
+++ b/src/Appwrite/Database/Validator/Key.php
@@ -34,15 +34,15 @@ class Key extends Validator
      */
     public function isValid($value)
     {
-        if(!is_string($value)) {
+        if(!\is_string($value)) {
             return false;
         }
         
-        if (preg_match('/[^A-Za-z0-9\-\_]/', $value)) {
+        if (\preg_match('/[^A-Za-z0-9\-\_]/', $value)) {
             return false;
         }
 
-        if (mb_strlen($value) > 32) {
+        if (\mb_strlen($value) > 32) {
             return false;
         }
 
diff --git a/src/Appwrite/Database/Validator/Permissions.php b/src/Appwrite/Database/Validator/Permissions.php
index 90144df38..553d8ff2a 100644
--- a/src/Appwrite/Database/Validator/Permissions.php
+++ b/src/Appwrite/Database/Validator/Permissions.php
@@ -50,21 +50,21 @@ class Permissions extends Validator
      */
     public function isValid($value)
     {
-        if (!is_array($value) && !empty($value)) {
+        if (!\is_array($value) && !empty($value)) {
             $this->message = 'Invalid permissions data structure';
 
             return false;
         }
 
         foreach ($value as $action => $roles) {
-            if (!in_array($action, ['read', 'write'])) {
+            if (!\in_array($action, ['read', 'write'])) {
                 $this->message = 'Unknown action ("'.$action.'")';
 
                 return false;
             }
 
             foreach ($roles as $role) {
-                if (!is_string($role)) {
+                if (!\is_string($role)) {
                     $this->message = 'Permissions role must be a string';
 
                     return false;
diff --git a/src/Appwrite/Database/Validator/Structure.php b/src/Appwrite/Database/Validator/Structure.php
index 8b807822f..3a18c4276 100644
--- a/src/Appwrite/Database/Validator/Structure.php
+++ b/src/Appwrite/Database/Validator/Structure.php
@@ -124,11 +124,11 @@ class Structure extends Validator
      */
     public function isValid($document)
     {
-        $document = (is_array($document)) ? new Document($document) : $document;
+        $document = (\is_array($document)) ? new Document($document) : $document;
 
         $this->id = $document->getId();
 
-        if (is_null($document->getCollection())) {
+        if (\is_null($document->getCollection())) {
             $this->message = 'Missing collection attribute $collection';
 
             return false;
@@ -136,14 +136,14 @@ class Structure extends Validator
 
         $collection = $this->getCollection($document->getCollection());
 
-        if (is_null($collection->getId()) || Database::SYSTEM_COLLECTION_COLLECTIONS != $collection->getCollection()) {
+        if (\is_null($collection->getId()) || Database::SYSTEM_COLLECTION_COLLECTIONS != $collection->getCollection()) {
             $this->message = 'Collection not found';
 
             return false;
         }
 
         $array = $document->getArrayCopy();
-        $rules = array_merge($this->rules, $collection->getAttribute('rules', []));
+        $rules = \array_merge($this->rules, $collection->getAttribute('rules', []));
 
         foreach ($rules as $rule) { // Check all required keys are set
             if (isset($rule['key']) && !isset($array[$rule['key']])
@@ -208,11 +208,11 @@ class Structure extends Validator
             }
 
             if (empty($validator)) { // Error creating validator for property
-                $this->message = 'Unknown rule type "'.$ruleType.'" for property "'.htmlspecialchars($key, ENT_QUOTES, 'UTF-8').'"';
+                $this->message = 'Unknown rule type "'.$ruleType.'" for property "'.\htmlspecialchars($key, ENT_QUOTES, 'UTF-8').'"';
 
                 if (empty($ruleType)) {
                     $this->message = 'Unknown property "'.$key.'" type'.
-                        '. Make sure to follow '.strtolower($collection->getAttribute('name', 'unknown')).' collection structure';
+                        '. Make sure to follow '.\strtolower($collection->getAttribute('name', 'unknown')).' collection structure';
                 }
 
                 return false;
@@ -232,7 +232,7 @@ class Structure extends Validator
             }
 
             if ($ruleArray) { // Array of values validation
-                if (!is_array($value)) {
+                if (!\is_array($value)) {
                     $this->message = 'Property "'.$key.'" must be an array';
 
                     return false;
@@ -260,8 +260,8 @@ class Structure extends Validator
         }
 
         if (!empty($array)) { // No fields should be left unvalidated
-            $this->message = 'Unknown properties are not allowed ('.implode(', ', array_keys($array)).') for this collection'.
-                '. Make sure to follow '.strtolower($collection->getAttribute('name', 'unknown')).' collection structure';
+            $this->message = 'Unknown properties are not allowed ('.\implode(', ', \array_keys($array)).') for this collection'.
+                '. Make sure to follow '.\strtolower($collection->getAttribute('name', 'unknown')).' collection structure';
 
             return false;
         }
diff --git a/src/Appwrite/Database/Validator/UID.php b/src/Appwrite/Database/Validator/UID.php
index 5dc1b8d69..67a9b6c2f 100644
--- a/src/Appwrite/Database/Validator/UID.php
+++ b/src/Appwrite/Database/Validator/UID.php
@@ -29,7 +29,7 @@ class UID extends Validator
      */
     public function isValid($value)
     {
-        if (is_numeric($value)) {
+        if (\is_numeric($value)) {
             //return false;
         }
 
diff --git a/src/Appwrite/Network/Validator/CNAME.php b/src/Appwrite/Network/Validator/CNAME.php
index fb000d22e..f9a8e5a13 100644
--- a/src/Appwrite/Network/Validator/CNAME.php
+++ b/src/Appwrite/Network/Validator/CNAME.php
@@ -34,12 +34,12 @@ class CNAME extends Validator
     public function isValid($domain)
     {
         try {
-            $records = dns_get_record($domain, DNS_CNAME);
+            $records = \dns_get_record($domain, DNS_CNAME);
         } catch (\Throwable $th) {
             return false;
         }
 
-        if(!$records || !is_array($records)) {
+        if(!$records || !\is_array($records)) {
             return false;
         }
 
diff --git a/src/Appwrite/Network/Validator/Origin.php b/src/Appwrite/Network/Validator/Origin.php
index a1c0d1f56..a0c06503a 100644
--- a/src/Appwrite/Network/Validator/Origin.php
+++ b/src/Appwrite/Network/Validator/Origin.php
@@ -81,7 +81,7 @@ class Origin extends Validator
 
     public function getDescription()
     {
-        if(!array_key_exists($this->client, $this->platforms)) {
+        if(!\array_key_exists($this->client, $this->platforms)) {
             return 'Unsupported platform';
         }
 
@@ -99,8 +99,8 @@ class Origin extends Validator
      */
     public function isValid($origin)
     {
-        $scheme = parse_url($origin, PHP_URL_SCHEME);
-        $host = parse_url($origin, PHP_URL_HOST);
+        $scheme = \parse_url($origin, PHP_URL_SCHEME);
+        $host = \parse_url($origin, PHP_URL_HOST);
 
         $this->host = $host;
         $this->client = $scheme;
@@ -109,7 +109,7 @@ class Origin extends Validator
             return true;
         }
 
-        if(in_array($host, $this->clients)) {
+        if(\in_array($host, $this->clients)) {
             return true;
         }
 
diff --git a/src/Appwrite/OpenSSL/OpenSSL.php b/src/Appwrite/OpenSSL/OpenSSL.php
index ab535076d..24d48e226 100644
--- a/src/Appwrite/OpenSSL/OpenSSL.php
+++ b/src/Appwrite/OpenSSL/OpenSSL.php
@@ -20,7 +20,7 @@ class OpenSSL
      */
     public static function encrypt($data, $method, $key, $options = 0, $iv = '', &$tag = null, $aad = '', $tag_length = 16)
     {
-        return openssl_encrypt($data, $method, $key, $options, $iv, $tag, $aad, $tag_length);
+        return \openssl_encrypt($data, $method, $key, $options, $iv, $tag, $aad, $tag_length);
     }
 
     /**
@@ -36,7 +36,7 @@ class OpenSSL
      */
     public static function decrypt($data, $method, $password, $options = 1, $iv = '', $tag = '', $aad = '')
     {
-        return openssl_decrypt($data, $method, $password, $options, $iv, $tag, $aad);
+        return \openssl_decrypt($data, $method, $password, $options, $iv, $tag, $aad);
     }
 
     /**
@@ -46,7 +46,7 @@ class OpenSSL
      */
     public static function cipherIVLength($method)
     {
-        return openssl_cipher_iv_length($method);
+        return \openssl_cipher_iv_length($method);
     }
 
     /**
@@ -57,6 +57,6 @@ class OpenSSL
      */
     public static function randomPseudoBytes($length, &$crypto_strong = null)
     {
-        return openssl_random_pseudo_bytes($length, $crypto_strong);
+        return \openssl_random_pseudo_bytes($length, $crypto_strong);
     }
 }
diff --git a/src/Appwrite/Resize/Resize.php b/src/Appwrite/Resize/Resize.php
index fed3e92c9..525232e71 100644
--- a/src/Appwrite/Resize/Resize.php
+++ b/src/Appwrite/Resize/Resize.php
@@ -112,9 +112,9 @@ class Resize
     public function save(string $path = null, string $type = '', int $quality = 75)
     {
         // Create directory with write permissions
-        if (null !== $path && !file_exists(dirname($path))) {
-            if (!@mkdir(dirname($path), 0755, true)) {
-                throw new Exception('Can\'t create directory '.dirname($path));
+        if (null !== $path && !\file_exists(\dirname($path))) {
+            if (!@\mkdir(\dirname($path), 0755, true)) {
+                throw new Exception('Can\'t create directory '.\dirname($path));
             }
         }
 
@@ -134,30 +134,30 @@ class Resize
                 //$this->image->setImageFormat('webp');
 
                 $signature = $this->image->getImageSignature();
-                $temp = '/tmp/temp-'.$signature.'.'.strtolower($this->image->getImageFormat());
+                $temp = '/tmp/temp-'.$signature.'.'.\strtolower($this->image->getImageFormat());
                 $output = '/tmp/output-'.$signature.'.webp';
 
                 // save temp
                 $this->image->writeImages($temp, true);
 
                 // convert temp
-                exec("cwebp -quiet -metadata none -q $quality $temp -o $output");
+                \exec("cwebp -quiet -metadata none -q $quality $temp -o $output");
 
-                $data = file_get_contents($output);
+                $data = \file_get_contents($output);
 
                 //load webp
                 if (empty($path)) {
                     return $data;
                 } else {
-                    file_put_contents($path, $data, LOCK_EX);
+                    \file_put_contents($path, $data, LOCK_EX);
                 }
 
                 $this->image->clear();
                 $this->image->destroy();
 
                 //delete webp
-                unlink($output);
-                unlink($temp);
+                \unlink($output);
+                \unlink($temp);
 
                 return;
 
@@ -165,7 +165,7 @@ class Resize
 
             case 'png':
                 /* Scale quality from 0-100 to 0-9 */
-                $scaleQuality = round(($quality / 100) * 9);
+                $scaleQuality = \round(($quality / 100) * 9);
 
                 /* Invert quality setting as 0 is best, not 9 */
                 $invertScaleQuality = 9 - $scaleQuality;
diff --git a/src/Appwrite/Storage/Compression/Algorithms/GZIP.php b/src/Appwrite/Storage/Compression/Algorithms/GZIP.php
index 61a6ccc8f..df4e0236b 100644
--- a/src/Appwrite/Storage/Compression/Algorithms/GZIP.php
+++ b/src/Appwrite/Storage/Compression/Algorithms/GZIP.php
@@ -28,7 +28,7 @@ class GZIP extends Compression
      */
     public function compress(string $data):string
     {
-        return gzencode($data);
+        return \gzencode($data);
     }
 
     /**
@@ -40,6 +40,6 @@ class GZIP extends Compression
      */
     public function decompress(string $data):string
     {
-        return gzdecode($data);
+        return \gzdecode($data);
     }
 }
diff --git a/src/Appwrite/Storage/Device/Local.php b/src/Appwrite/Storage/Device/Local.php
index 9a331529b..961daee38 100644
--- a/src/Appwrite/Storage/Device/Local.php
+++ b/src/Appwrite/Storage/Device/Local.php
@@ -56,7 +56,7 @@ class Local extends Device
         $path = '';
 
         for ($i = 0; $i < 4; ++$i) {
-            $path = ($i < strlen($filename)) ? $path.DIRECTORY_SEPARATOR.$filename[$i] : $path.DIRECTORY_SEPARATOR.'x';
+            $path = ($i < \strlen($filename)) ? $path.DIRECTORY_SEPARATOR.$filename[$i] : $path.DIRECTORY_SEPARATOR.'x';
         }
 
         return $this->getRoot().$path.DIRECTORY_SEPARATOR.$filename;
@@ -76,13 +76,13 @@ class Local extends Device
      */
     public function upload($source, $path):bool
     {
-        if (!file_exists(dirname($path))) { // Checks if directory path to file exists
-            if (!@mkdir(dirname($path), 0755, true)) {
-                throw new Exception('Can\'t create directory: '.dirname($path));
+        if (!\file_exists(\dirname($path))) { // Checks if directory path to file exists
+            if (!@\mkdir(\dirname($path), 0755, true)) {
+                throw new Exception('Can\'t create directory: '.\dirname($path));
             }
         }
 
-        if (move_uploaded_file($source, $path)) {
+        if (\move_uploaded_file($source, $path)) {
             return true;
         }
 
@@ -98,7 +98,7 @@ class Local extends Device
      */
     public function read(string $path):string
     {
-        return file_get_contents($path);
+        return \file_get_contents($path);
     }
 
     /**
@@ -111,13 +111,13 @@ class Local extends Device
      */
     public function write(string $path, string $data):bool
     {
-        if (!file_exists(dirname($path))) { // Checks if directory path to file exists
-            if (!@mkdir(dirname($path), 0755, true)) {
-                throw new Exception('Can\'t create directory '.dirname($path));
+        if (!\file_exists(\dirname($path))) { // Checks if directory path to file exists
+            if (!@\mkdir(\dirname($path), 0755, true)) {
+                throw new Exception('Can\'t create directory '.\dirname($path));
             }
         }
 
-        return file_put_contents($path, $data);
+        return \file_put_contents($path, $data);
     }
 
     /**
@@ -132,13 +132,13 @@ class Local extends Device
      */
     public function move(string $source, string $target):bool
     {
-        if (!file_exists(dirname($target))) { // Checks if directory path to file exists
-            if (!@mkdir(dirname($target), 0755, true)) {
-                throw new Exception('Can\'t create directory '.dirname($target));
+        if (!\file_exists(\dirname($target))) { // Checks if directory path to file exists
+            if (!@\mkdir(\dirname($target), 0755, true)) {
+                throw new Exception('Can\'t create directory '.\dirname($target));
             }
         }
 
-        if (rename($source, $target)) {
+        if (\rename($source, $target)) {
             return true;
         }
 
@@ -157,17 +157,17 @@ class Local extends Device
      */
     public function delete(string $path, bool $recursive = false):bool
     {
-        if(is_dir($path) && $recursive) {
-            $files = glob($path.'*', GLOB_MARK); // GLOB_MARK adds a slash to directories returned
+        if(\is_dir($path) && $recursive) {
+            $files = \glob($path.'*', GLOB_MARK); // GLOB_MARK adds a slash to directories returned
     
             foreach($files as $file) {
                 $this->delete($file, true);      
             }
     
-            rmdir($path);
+            \rmdir($path);
         }
-        elseif(is_file($path)) {
-            return unlink($path);
+        elseif(\is_file($path)) {
+            return \unlink($path);
         }
 
         return false;
@@ -184,7 +184,7 @@ class Local extends Device
      */
     public function getFileSize(string $path):int
     {
-        return filesize($path);
+        return \filesize($path);
     }
 
     /**
@@ -198,7 +198,7 @@ class Local extends Device
      */
     public function getFileMimeType(string $path):string
     {
-        return mime_content_type($path);
+        return \mime_content_type($path);
     }
 
     /**
@@ -212,7 +212,7 @@ class Local extends Device
      */
     public function getFileHash(string $path):string
     {
-        return md5_file($path);
+        return \md5_file($path);
     }
 
     /**
@@ -230,27 +230,27 @@ class Local extends Device
     {
         $size = 0;
 
-        $directory = opendir($path);
+        $directory = \opendir($path);
 
         if (!$directory) {
             return -1;
         }
 
-        while (($file = readdir($directory)) !== false) {
+        while (($file = \readdir($directory)) !== false) {
             // Skip file pointers
             if ($file[0] == '.') {
                 continue;
             }
 
             // Go recursive down, or add the file size
-            if (is_dir($path.$file)) {
+            if (\is_dir($path.$file)) {
                 $size += $this->getDirectorySize($path.$file.DIRECTORY_SEPARATOR);
             } else {
-                $size += filesize($path.$file);
+                $size += \filesize($path.$file);
             }
         }
 
-        closedir($directory);
+        \closedir($directory);
 
         return $size;
     }
@@ -264,7 +264,7 @@ class Local extends Device
      */
     public function getPartitionFreeSpace():float
     {
-        return disk_free_space($this->getRoot());
+        return \disk_free_space($this->getRoot());
     }
 
     /**
@@ -276,6 +276,6 @@ class Local extends Device
      */
     public function getPartitionTotalSpace():float
     {
-        return disk_total_space($this->getRoot());
+        return \disk_total_space($this->getRoot());
     }
 }
diff --git a/src/Appwrite/Storage/Device/S3.php b/src/Appwrite/Storage/Device/S3.php
index 5706891b2..5270c14d9 100644
--- a/src/Appwrite/Storage/Device/S3.php
+++ b/src/Appwrite/Storage/Device/S3.php
@@ -40,7 +40,7 @@ class S3 extends Device
         $path = '';
 
         for ($i = 0; $i < 4; ++$i) {
-            $path = ($i < strlen($filename)) ? $path.DIRECTORY_SEPARATOR.$filename[$i] : $path.DIRECTORY_SEPARATOR.'x';
+            $path = ($i < \strlen($filename)) ? $path.DIRECTORY_SEPARATOR.$filename[$i] : $path.DIRECTORY_SEPARATOR.'x';
         }
 
         return $this->getRoot().$path.DIRECTORY_SEPARATOR.$filename;
diff --git a/src/Appwrite/Storage/Storage.php b/src/Appwrite/Storage/Storage.php
index a5d38e0f5..800c90b43 100644
--- a/src/Appwrite/Storage/Storage.php
+++ b/src/Appwrite/Storage/Storage.php
@@ -27,7 +27,7 @@ class Storage
      */
     public static function addDevice($name, Device $device)
     {
-        if (array_key_exists($name, self::$devices)) {
+        if (\array_key_exists($name, self::$devices)) {
             throw new Exception('The device "'.$name.'" is already listed');
         }
 
@@ -47,7 +47,7 @@ class Storage
      */
     public static function getDevice($name)
     {
-        if (!array_key_exists($name, self::$devices)) {
+        if (!\array_key_exists($name, self::$devices)) {
             throw new Exception('The device "'.$name.'" is not listed');
         }
 
@@ -65,7 +65,7 @@ class Storage
      */
     public static function exists($name)
     {
-        return (bool) array_key_exists($name, self::$devices);
+        return (bool) \array_key_exists($name, self::$devices);
     }
 
     /**
@@ -89,6 +89,6 @@ class Storage
             ++$i;
         }
 
-        return round($bytes, $decimals).$units[$i];
+        return \round($bytes, $decimals).$units[$i];
     }
 }
diff --git a/src/Appwrite/Storage/Validator/FileName.php b/src/Appwrite/Storage/Validator/FileName.php
index d823e9ba5..728e46552 100644
--- a/src/Appwrite/Storage/Validator/FileName.php
+++ b/src/Appwrite/Storage/Validator/FileName.php
@@ -24,7 +24,7 @@ class FileName extends Validator
             return false;
         }
 
-        if (!preg_match('/^[a-zA-Z0-9.]+$/', $name)) {
+        if (!\preg_match('/^[a-zA-Z0-9.]+$/', $name)) {
             return false;
         }
 
diff --git a/src/Appwrite/Storage/Validator/FileType.php b/src/Appwrite/Storage/Validator/FileType.php
index 7ceceb48f..c66631e73 100644
--- a/src/Appwrite/Storage/Validator/FileType.php
+++ b/src/Appwrite/Storage/Validator/FileType.php
@@ -68,23 +68,23 @@ class FileType extends Validator
             return false;
         }
 
-        $handle = fopen($path, 'r');
+        $handle = \fopen($path, 'r');
 
         if (!$handle) {
             return false;
         }
 
-        $bytes = fgets($handle, 8);
+        $bytes = \fgets($handle, 8);
 
         foreach ($this->whiteList as $key) {
-            if (strpos($bytes, $this->types[$key]) === 0) {
-                fclose($handle);
+            if (\strpos($bytes, $this->types[$key]) === 0) {
+                \fclose($handle);
 
                 return true;
             }
         }
 
-        fclose($handle);
+        \fclose($handle);
 
         return false;
     }
diff --git a/src/Appwrite/Template/Template.php b/src/Appwrite/Template/Template.php
index 18dfecd51..127afef15 100644
--- a/src/Appwrite/Template/Template.php
+++ b/src/Appwrite/Template/Template.php
@@ -23,13 +23,13 @@ class Template extends View
             return '';
         }
 
-        if (is_readable($this->path)) {
-            $template = file_get_contents($this->path); // Include template file
+        if (\is_readable($this->path)) {
+            $template = \file_get_contents($this->path); // Include template file
         } else {
             throw new Exception('"'.$this->path.'" template is not readable or not found');
         }
 
-        $template = str_replace(array_keys($this->params), array_values($this->params), $template);
+        $template = \str_replace(\array_keys($this->params), \array_values($this->params), $template);
 
         return $template;
     }
@@ -45,7 +45,7 @@ class Template extends View
      */
     public static function parseURL($url)
     {
-        return parse_url($url);
+        return \parse_url($url);
     }
 
     /**
@@ -89,10 +89,10 @@ class Template extends View
     {
         $parsed = [];
 
-        parse_str($query1, $parsed);
+        \parse_str($query1, $parsed);
 
-        $parsed = array_merge($parsed, $query2);
+        $parsed = \array_merge($parsed, $query2);
 
-        return http_build_query($parsed);
+        return \http_build_query($parsed);
     }
 }
diff --git a/src/Appwrite/URL/URL.php b/src/Appwrite/URL/URL.php
index e49845c53..b4e55039e 100644
--- a/src/Appwrite/URL/URL.php
+++ b/src/Appwrite/URL/URL.php
@@ -26,7 +26,7 @@ class URL
             'fragment' => '',
         ];
 
-        return array_merge($default, parse_url($url));
+        return \array_merge($default, \parse_url($url));
     }
     
     /**
@@ -41,7 +41,7 @@ class URL
      */
     static public function unparse(array $url, array $ommit = []):string
     {
-        if (isset($url['path']) && mb_substr($url['path'], 0, 1) !== '/') {
+        if (isset($url['path']) && \mb_substr($url['path'], 0, 1) !== '/') {
             $url['path'] = '/'.$url['path'];
         }
     
@@ -87,7 +87,7 @@ class URL
      */
     static public function parseQuery(string $query):array
     {
-        parse_str($query, $result);
+        \parse_str($query, $result);
 
         return $result;
     }
@@ -103,6 +103,6 @@ class URL
      */
     static public function unparseQuery(array $query):string
     {
-        return http_build_query($query);
+        return \http_build_query($query);
     }
 }
\ No newline at end of file